Freddy I have looked at those pictures,  I think they help a little, even if the Fulani chaps have modern versions.  The Sahel is a massive strip across the African continent.  At one time purloined by the French and British.  I would think this spear is from the British controlled regions which would suggest a Fulani origin.  I do not think these are Hausa pieces.   There again things were traded so they could well have been used by the Tuareg but I do not think they are of western Tuareg origin. Now where is that Manding knife????? 
